Commit 6e526fdf authored by Johan Hovold's avatar Johan Hovold Committed by David S. Miller

net: wimax/i2400m: fix NULL-deref at probe

Make sure to check the number of endpoints to avoid dereferencing a
NULL-pointer or accessing memory beyond the endpoint array should a
malicious device lack the expected endpoints.

The endpoints are specifically dereferenced in the i2400m_bootrom_init
path during probe (e.g. in i2400mu_tx_bulk_out).

Fixes: f398e424 ("i2400m/USB: probe/disconnect, dev init/shutdown
and reset backends")
Cc: Inaky Perez-Gonzalez <inaky@linux.intel.com>
Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 68c32f9c
......@@ -467,6 +467,9 @@ int i2400mu_probe(struct usb_interface *iface,
struct i2400mu *i2400mu;
struct usb_device *usb_dev = interface_to_usbdev(iface);
if (iface->cur_altsetting->desc.bNumEndpoints < 4)
return -ENODEV;
if (usb_dev->speed != USB_SPEED_HIGH)
dev_err(dev, "device not connected as high speed\n");
......
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